import graphene
import json
from graphene import Field, Boolean, List, String, JSONString, Int

from backend.core.commands import (
    CreateServiceCommand,
    UpdateServiceCommand,
    DeleteServiceCommand,
    CompleteServiceCommand,
    CancelServiceCommand,
    AssignTeamMembersCommand,
    GetServicesByDateRangeCommand,
    BulkScheduleServicesCommand
)
from backend.core.repositories import ServiceRepository, AccountRepository, ProfileRepository, ScheduleRepository
from backend.graphql_api.types import ServiceType
from backend.graphql_api.inputs import ServiceCreateInput, ServiceUpdateInput


class CreateServiceMutation(graphene.Mutation):
    """Mutation to create a new service."""
    class Arguments:
        input = ServiceCreateInput(required=True)

    service = Field(ServiceType)
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, input):
        try:
            service_repo = ServiceRepository()
            account_repo = AccountRepository()
            profile_repo = ProfileRepository()
            command = CreateServiceCommand(
                service_repo=service_repo,
                account_repo=account_repo,
                profile_repo=profile_repo,
                account_id=input.account_id,
                date=input.date,
                status=input.status,
                team_member_ids=input.team_member_ids,
                notes=input.notes,
                deadline_start=input.deadline_start,
                deadline_end=input.deadline_end
            )
            result = command.execute()
            return {
                'service': result.data,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'service': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while creating the service"
            }


class UpdateServiceMutation(graphene.Mutation):
    """Mutation to update an existing service."""
    class Arguments:
        input = ServiceUpdateInput(required=True)

    service = Field(ServiceType)
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, input):
        try:
            service_repo = ServiceRepository()
            account_repo = AccountRepository()
            profile_repo = ProfileRepository()
            command = UpdateServiceCommand(
                service_repo=service_repo,
                account_repo=account_repo,
                profile_repo=profile_repo,
                service_id=input.id,
                status=input.status,
                date=input.date,
                team_member_ids=input.team_member_ids,
                notes=input.notes,
                deadline_start=input.deadline_start,
                deadline_end=input.deadline_end
            )
            result = command.execute()
            return {
                'service': result.data,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'service': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while updating the service"
            }


class DeleteServiceMutation(graphene.Mutation):
    """Mutation to delete a service."""
    class Arguments:
        id = graphene.ID(required=True)

    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, id):
        try:
            service_repo = ServiceRepository()
            command = DeleteServiceCommand(
                service_repo=service_repo,
                service_id=id
            )
            result = command.execute()
            return {
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while deleting the service"
            }


class CompleteServiceMutation(graphene.Mutation):
    """Mutation to mark a service as complete."""
    class Arguments:
        id = graphene.ID(required=True)
        completion_notes = graphene.String()

    service = Field(ServiceType)
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, id, completion_notes=None):
        try:
            service_repo = ServiceRepository()
            command = CompleteServiceCommand(
                service_repo=service_repo,
                service_id=id,
                completion_notes=completion_notes
            )
            result = command.execute()
            return {
                'service': result.data,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'service': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while completing the service"
            }


class CancelServiceMutation(graphene.Mutation):
    """Mutation to cancel a service."""
    class Arguments:
        id = graphene.ID(required=True)
        cancellation_reason = graphene.String()

    service = Field(ServiceType)
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, id, cancellation_reason=None):
        try:
            service_repo = ServiceRepository()
            command = CancelServiceCommand(
                service_repo=service_repo,
                service_id=id,
                cancellation_reason=cancellation_reason
            )
            result = command.execute()
            return {
                'service': result.data,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'service': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while cancelling the service"
            }


class AssignTeamMembersMutation(graphene.Mutation):
    """Mutation to assign team members to a service."""
    class Arguments:
        service_id = graphene.ID(required=True)
        team_member_ids = List(graphene.ID, required=True)

    service = Field(ServiceType)
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, service_id, team_member_ids):
        try:
            service_repo = ServiceRepository()
            profile_repo = ProfileRepository()
            command = AssignTeamMembersCommand(
                service_repo=service_repo,
                profile_repo=profile_repo,
                service_id=service_id,
                team_member_ids=team_member_ids
            )
            result = command.execute()
            return {
                'service': result.data,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'service': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while assigning team members"
            }


class GetServicesByDateRangeMutation(graphene.Mutation):
    """Mutation to get services within a date range."""
    class Arguments:
        start_date = graphene.String(required=True)
        end_date = graphene.String(required=True)
        account_id = graphene.ID()
        team_member_id = graphene.ID()

    services = List(ServiceType)
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, start_date, end_date, account_id=None, team_member_id=None):
        try:
            service_repo = ServiceRepository()
            command = GetServicesByDateRangeCommand(
                service_repo=service_repo,
                start_date=start_date,
                end_date=end_date,
                account_id=account_id,
                team_member_id=team_member_id
            )
            result = command.execute()
            return {
                'services': result.data,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'services': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while retrieving services"
            }


class BulkScheduleServicesMutation(graphene.Mutation):
    """Mutation to bulk schedule services for multiple accounts."""
    class Arguments:
        account_ids = List(graphene.ID, required=True)
        year = Int(required=True)
        month = Int(required=True)

    results = JSONString()
    success = Boolean()
    errors = List(String)
    message = String()

    @staticmethod
    def mutate(root, info, account_ids, year, month):
        try:
            account_repo = AccountRepository()
            schedule_repo = ScheduleRepository()
            command = BulkScheduleServicesCommand(
                account_repo=account_repo,
                schedule_repo=schedule_repo,
                account_ids=account_ids,
                year=year,
                month=month
            )
            result = command.execute()
            # Convert result.data to JSON string to ensure it's serializable
            serialized_results = json.dumps(result.data, default=str)
            return {
                'results': serialized_results,
                'success': result.success,
                'errors': result.errors,
                'message': result.message
            }
        except Exception as e:
            return {
                'results': None,
                'success': False,
                'errors': [str(e)],
                'message': "An error occurred while bulk scheduling services"
            }